LONDON — Coming out of Brexit this year, Britain’s government needed a new blueprint for the future of the nation’s financial services as cities like Amsterdam and Paris vied to become Europe’s next capital of investment and banking.For some, the answer was Deliveroo, a London-based food delivery company with 100,000 riders on motor scooters and bicycles. Although it lost more than 226 million pounds (nearly $310 million) last year, Deliveroo offered the raw promise of many fast-growing tech start-ups — and it became a symbol of Britain’s new ambitions by deciding to go public and list its shares not in …
